Hydroponic & Greenhouse Solutions

greenhouse interior, growing lettuce
High-Quality Hydroponic Products and Superior Technical Support to Help Growers Succeed

Since 1982 we’ve grown to become one of the largest manufacturers and distributors of commercial greenhouse structures and equipment, hydroponic systems, and growing supplies, with customers throughout the United States, Canada, Mexico, Europe and the Caribbean.

lettuce plants lined up in a row
Controlled Environment Agriculture Specialists

CropKing emphasizes service, quality, and competitive pricing, and is the only company in the U.S. that offers a full range of services to its growers. From monthly 2-Day Grower Workshops, Grower’s Manuals, Training Videos and CDs, Technical Support and CropKing supplies not only the products, but also the technology to help growers succeed.

For over 35 years, CropKing has been the leader in controlled environment agriculture. We’ve manufactured and sold greenhouse structures, hydroponic growing systems, growing supplies, and education materials.

Schools and Universities

Students working with hydroponic systems.
Custom design systems, labs, classrooms and greenhouses.

CropKing is dedicated to educating the next generation of growers and making hydroponics in the classroom accessible whether you're growing in a greenhouse, an unused classroom, or on a desktop. We've developed custom solutions to meet the needs of educators at both the k-12 and university levels.

two men standing inside a greenhouse, holding a blueprint-looking sketch of a greenhouse
designed and built in the usa
Custom Design & Commercial Projects

Let us help you design a facility based on your unique needs! We have a talented team of engineers on staff, available for custom or site-specific builds complete with consulting and general contracting services. CropKing also offers turn-key packages complete with growing & light deprivation systems, heating, cooling, and environmental controls. Our staff can retro-fit your existing greenhouse, design hydroponic systems for your warehouse, or customize almost anywhere you want to grow.

person in a workshop welding the edge of a greenhouse part
person in a workshop welding the edge of a greenhouse part

Did you know our shop manufactures CropKing systems on-site? Check out our shop foreman, Jim Bise, welding up this custom system.

The future of CropKing is that it continues to evolve as an honest company selling an honest product and trying to help people become more successful growers.

— Marilyn Brentlinger, Founder

Latest Articles From Our Blog

  • Cannabis Greenhouse

    Best Photoperiod for Growing Plants

    Colin Clark, Technical Horticulturist •

    There seems to be some debate about whether plants will grow better under 24hrs of light, and today we're breaking...

  • How To Maximize Produce Profits at Farmer’s Markets and Retail

    CropKing • May 19, 2021

    The Covid-19 pandemic hasn’t seemed to curb our appetites or enthusiasm for fresh vegetables. In fact, trend...

  • Careers in hydroponics

    Take a Virtual Greenhouse Field Trip with CropKing!

    Dave Langlois • June 28, 2020

    School may be out for the summer, but that doesn't mean learning has to stop! CropKing has partnered with EarthEcho...